An important loss in an industrial gas turbine is caused by the intake system. Even though these losses have a direct effect on the performance of the engine, the design of the intake system is dominated by local space restriction. Consequently, intake losses are site specific parameters. They correlate with the airflow velocity and therefore operating conditions of the engine affect the intake performance. But due to the high experimental effort necessary to investigate intake losses, only sparse information about this effect is available. For the present study a typical vertical industrial intake duct was investigated numerically for different operating scenarios. The performance simulation of a single shaft heavy duty gas turbine provided boundary conditions for the CFD (Computational Fluid Dynamics) study of the intake duct. For all operating conditions a large scale vortex developed in the intake plenum and entered the compressor. Bearing support struts caused local flow distortion at the compressor inlet. Even for extreme operating scenarios the relative changes of pressure recovery compared to the design point value were small (0.1%). However, the resulting power change was generally in excess of the intake loss deviation. Applied to a heavy duty gas turbine, the maximum deviation of 0.2% of power was equivalent to about 0.4 MW. In most cases lower pressure losses were predicted which benefited the overall engine performance. For the cold scenario the intake performance deteriorated and resulted in a relative reduction of power of nearly 0.5 MW.
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ASME Turbo Expo 2006: Power for Land, Sea, and Air
May 8–11, 2006
Barcelona, Spain
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4239-8
PROCEEDINGS PAPER
Performance and Numerical Flow Investigations of an Industrial Gas Turbine Intake System Under Different Operating Conditions
Friederike C. Mund,
Friederike C. Mund
Cranfield University, Cranfield, UK
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Pericles Pilidis
Pericles Pilidis
Cranfield University, Cranfield, UK
Search for other works by this author on:
Friederike C. Mund
Cranfield University, Cranfield, UK
Pericles Pilidis
Cranfield University, Cranfield, UK
Paper No:
GT2006-91215, pp. 903-912; 10 pages
Published Online:
September 19, 2008
Citation
Mund, FC, & Pilidis, P. "Performance and Numerical Flow Investigations of an Industrial Gas Turbine Intake System Under Different Operating Conditions." Proceedings of the ASME Turbo Expo 2006: Power for Land, Sea, and Air. Volume 4: Cycle Innovations; Electric Power; Industrial and Cogeneration; Manufacturing Materials and Metallurgy. Barcelona, Spain. May 8–11, 2006. pp. 903-912. ASME. https://doi.org/10.1115/GT2006-91215
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